php - 从特定节点查找根索引数组的深度

Question

我有一个像

我想从特定的内部数组 id 中找到根索引子数组的深度。例如我想从 parentid=0 找到根索引数组的深度，它应该是 1。从 parentId=0/80/82/83 开始的根索引子数组的深度应该是 4。

实际上我的目标是限制数组的深度。应该有深度限制。所以当任何人试图向这个数组添加一个子数组时，我们应该找出当前数组的深度。例如，数组深度限制为 4 ，并且任何人尝试在 cata_name= Masala Dosha 下添加子数组，深度已经达到并且不应允许添加新的子数组。但同时他可以在[cata_name] => Lunch下面添加一个子数组，因为它的深度只有1，深度限制是4。

score 0 · Accepted Answer

我看到你已经排除了一个答案，但这里有一个替代方案：

<?php
$arrayHandler = new ArrayHandler();
$arr = array();
//Adding array examples (without checking)
$arr[0]['subcategories'] = array('id'=>80);
$arr[0]['subcategories']['whatever'] = array('id'=>82);
$arr[0]['subcategories']['whatever']['whatever2'] = array('id'=>83);

//Will be added because this is fourth level from $arr[0]
$chk = $arrayHandler->addSubArray($arr[0], $arr[0]['subcategories']['whatever']['whatever2']['whatever3']); 
if ($chk !== false) {
    $arr[0]['subcategories']['whatever']['whatever2']['whatever3'] = array('id'=>84);
}

//Won't be added because this is fitfth level from $arr[0]
$chk = $arrayHandler->addSubArray($arr[0], $arr[0]['subcategories']['whatever']['whatever2']['whatever3']['whatever4']); 
if ($chk !== false) {
    $arr[0]['subcategories']['whatever']['whatever2']['whatever3']['whatever4'] = array('id'=>85);
}
echo print_r($arr,true);



class ArrayHandler {
    private $depthLimit = 4;
    private $depth = 1;


    public function addSubArray($checkFromNode, $addNode) {
        if (is_array($checkFromNode)) {
            //Do recursion as long as node is an array and count depth
            //If not an array anymore return value sent to this parameter
            foreach ($checkFromNode as $key=>$node) {
                if (is_array($node)) {
                    $this->depth++; 
                    $this->addSubArray($node, $addNode);
                }                       
            }

            if (intval($this->depth) > intval($this->depthLimit)) {
                return false;
            }

            return true;
        }

    }

}
?>

输出将在示例中：

Array ( [0] => Array ( [subcategories] => Array ( [id] => 80 [whatever] => Array ( [id] => 82 [whatever2] => Array ( [id] => 83 [whatever3] => Array ( [id] => 84 ) ) ) ) ) )

score 0 · Accepted Answer

试试这个，它工作，但我不喜欢这个

http://sandbox.onlinephpfunctions.com/code/9922bf9abec89477e5bd3a81c41feb953db604a1

$a=array(
array('id'=>81),
array('id'=>80,'subcategories'=>array('id'=>82,'subcategories'=>array('id'=>83,'subcategories'=>array('id'=>84,'subcategories'=>array())))),
);

echo "80:" . test($a,80);
echo PHP_EOL;
echo "81:" . test($a,81);
echo PHP_EOL;
echo "82:" . test($a,82);
echo PHP_EOL;
echo "83:" . test($a,83);


function test($a,$key){
    $aa=array();
    foreach($a as $v){
    $b=array();
    $content=print_r($v,true);
    $b['content']=$content;
    if(preg_match('/ {28}\[/',$content)){
    $b['over']=1;
    }else{
    $b['over']=0;
    }
    $aa[]=$b;
    }

    foreach($aa as $v){

        if(preg_match('/\[id\] => '.$key.'/',$v['content'])){
            return $v['over'];

        }

    }
    return 0;

}

然后

80:1
81:0
82:1
83:1

php - 从特定节点查找根索引数组的深度

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